TNTE High Sensitive Audio Pickup Device External Amplified Tiny Microphone for CCTV Security Camera CCTV MICROPHONE KIT QUALITY: HIGH LEVEL QUALITY CCTV MICROPHONE KIT FOR SECURITY CAMERA ON CCTV FIELD - This security microphone for CCTV security camera & compatible with devices that accept AV input, like DVR, VCR, TV, and any low-frequency amplifiers, amplified microphone CCTV AUDIO MICROPHONE KIT: Qualitative Pre-Amplifier increase a microphone's low output voltage to a stronger usable level. High Sensitive Audio Sound Pick Up. CCTV DVR audio microphone is guaranteed to work more than 5,000 hours SURVEILLANCE MICROPHONE: High gain and auto level adjustment + sensitivity adjustment. Qualitative elements and the modern design of the microphone make it the leader in World Wide Security CCTV Market. Compatible with CCTV BNC Cable, RCA Cable, Audio Cable, Power Cable. Great outdoor microphone for security camera. SPECIAL FEATURES: Particular and small design with low noise processing chips. Built in Micro processing chip and automatic gain control (AGC) Circuit. Long Transmitter Distance. Frequency response: 1006000Hz